CPT® Code 87299

An infectious agent antigen detection test is a laboratory procedure that utilizes an immunofluorescent technique to identify the presence of specific infectious organisms in a sample. This test is particularly useful when there is no specific code available for the infectious agent being tested. The process begins with the collection of a primary source sample, which may consist of tissue, cells, or body fluids. This specimen is then treated with a reagent that is specifically designed to bind to the antigen of the infectious agent in question. The sample is incubated under controlled conditions, such as a specific temperature or humidity, to facilitate the antigen-antibody reaction. Following the incubation period, the specimen undergoes a washing process to eliminate any unbound conjugate, ensuring that only the bound complexes remain. The cleaned specimen is then dried and mounted for examination. A fluorescence microscope, equipped with the necessary light source and filters, is employed to visualize the specimen. The presence of the infectious agent is indicated by a positive test result, which is characterized by a distinct color change, such as bright green or orange-yellow, observable under the microscope. This test is essential for diagnosing infections when specific coding for the infectious agent is not available, allowing for targeted treatment and management of the infection.